This paper addresses the problem of estimating reaching movements. We derive a Bayesian-optimal discrete-time state equation to support real-time filters that incorporate observations about the target position and arm...
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In this paper, we develop a novel index structure to support e±cient approximate k-nearest neighbor (KNN) query in high-dimensional databases. In high-dimensional spaces, the computational cost of the distance (e...
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This paper reports the design, fabrication, and experimental characterization of a surface tension-fed, planar array of micro-fabricated electrospray emitters intended for space propulsion applications in micro-satell...
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This paper reports the design, fabrication, and experimental characterization of a surface tension-fed, planar array of micro-fabricated electrospray emitters intended for space propulsion applications in micro-satellites. The planar array uses the ionic liquid EMI-BF4 as propellant. The surface of the engine (tank and emitters) is covered with "black silicon" that acts as wicking material. The hydraulics are micro-fabricated, with two possible emitter geometries. The electrodes are macro-fabricated, and externally provided to the micro-fabricated structure.
This paper reports the design, fabrication, and experimental characterization of a microfabricated, internally-fed linear array of electrospray emitters intended for space propulsion applications. The engine uses high...
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This paper reports the design, fabrication, and experimental characterization of a microfabricated, internally-fed linear array of electrospray emitters intended for space propulsion applications. The engine uses highly doped formamide as propellant, with electrical conductivity in the 0.3 - 3.0 S/m range. The electrospray array operates in the single Taylor cone droplet emission regime, and it requires about 2000 V to become activated. The reported device demonstrates the feasibility of high clustering of the electrospray emitters.
This paper presents the design and an evaluation of Mondrix, a version of the Linux kernel with Mondriaan Memory Protection (MMP). MMP is a combination of hardware and software that provides efficient fine-grained mem...
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The MVDR beamformer is the most extensively used array processing algorithm and involves inverting the sample covariance matrix. In the snapshot deficient scenario, when the number of sensors is greater than or approx...
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Given a directed graphical model with binary-valued hidden nodes and real-valued noisy observations, consider deciding upon the maximum a-posteriori (MAP) or the maximum posterior-marginal (MPM) assignment under the r...
Given a directed graphical model with binary-valued hidden nodes and real-valued noisy observations, consider deciding upon the maximum a-posteriori (MAP) or the maximum posterior-marginal (MPM) assignment under the restriction that each node broadcasts only to its children exactly one single-bit message. We present a variational formulation, viewing the processing rules local to all nodes as degrees-of-freedom, that minimizes the loss in expected (MAP or MPM) performance subject to such online communication constraints. The approach leads to a novel message-passing algorithm to be executed offline, or before observations are realized, which mitigates the performance loss by iteratively coupling all rules in a manner implicitly driven by global statistics. We also provide (i) illustrative examples, (ii) assumptions that guarantee convergence and efficiency and (iii) connections to active research areas.
Using the site-selective technique of combined excitation emission spectroscopy, we have studied a variety of Er doped silicon oxide layers with and without silicon nanocrystals. This technique allows clear distinctio...
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Simultaneous optical coherence tomography (OCT) and video microscopy were performed on the rat somatosensory cortex through a thinned skull during forepaw stimulation. Fractional change measurements in OCT images reve...
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Using the site-selective technique of combined excitation emission spectroscopy, we have studied a variety of Er doped silicon oxide layers with and without silicon nanocrystals. This technique allows clear distinctio...
Using the site-selective technique of combined excitation emission spectroscopy, we have studied a variety of Er doped silicon oxide layers with and without silicon nanocrystals. This technique allows clear distinction of cluster defect sites that are created during thermal annealing and become dominant for higher Er ion concentration and are suppressed by the presence of nanocrystals. In several samples, we were able to observe fluorescence line narrowing under resonant excitation allowing defect-selective excitation.
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